Sharpener for slicing-machines.



' W. A. VAN BERKEL.

SHARPENEB FOR SLICING MACHINES.

APPLICATION FILED DEC-31,1917.

mwm Jan. M, 1919.

2 SHEETSSHEET w. A. VAN BERKEL. SHABPENER FOR SLICING MACHINES.

APPLICATION FILED DEC-31.1917.

Patented Jan.14[,1919.

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"- sharpening the rotary lrnives oi slicing niachines, and has tor its ohject the provision. ot" a device oi the class named Which shall he oi in'iproved construction and more convenient and etlicient in its operation than simi lar devices previously lrnovvn.

'llheinvention is exemplified in the comhination and arrangement oit parts shovvn in the accompanying drawings, anddescrihed in the lollovving specification, and it is more particularly pointed out in the appended claims.

in the, drawings, lFigure l is a top plan view oi one emhodinient oil the present invention; l ig. it is a side elevation oi? the device shown in l ig. l; lhig. 3 isa transverse sectional view on line 3-3 oi l ig. 2," lt ig. t is a horizontal sectional vievv on. line ti l ozt'l ig. it; liig. 5 is a horisontal sec-- tional vievv on line 5-5 oil ltig. 93., Fig. ti is a vertical sectional vievv on line tl-tl oi Fig. 3; and 1g. l is a tragmentary vievv s1 atlar to ldig. ti hut having the parts in a dttlerent position relative to one another,

in the use oil machines having dish lrnives it tor slicing meat and other material, it is desirahie to have a device movahle into and out oi contact with the knife for sharpening its edge Whenever it hecomes necessary. lit has heen tound, in practice, that this can he accomplished, to the greatest advantage, hy providing grinding dishs vvhich may he resiliently pressed into contact tvith the pee tion oil the lrniife to he sharpened. lit also desirahle to provide a sharpener itor hoth oi purpose oi moving the grinders into and out oi contact with the hlade, it is desirahle to arrange the grinders so that they may he shrt'ted entirely avvay t'roin the lrni'le alter the grinding action is completed, so that they will not interiere vvith the slicing operation, and Will not hecome coated with grease or fragments oil" the meat heing sliced. Elince these grinders are usually operated hy hutchers and others not especially sltilled in the use oi? machinery, it has lireopientlv happened that the grinders are shitted in such a manner as to mar the edge ol' the lrnite. The present invention renders it nap'ossihle to so inisoperate the grinders,

in the dravvings, the numeral l designates the upper portion oi the standard oil a slicmg machine trains upon vvhich the rotary hnite is mounted, and the numeral it indicates the rotary slicing hnille. is secured to the standard It hy means oil a lag screw it, and a post 5 is adjiustahly held in the soclret 8. hy means oi a pin ti and. nut it. The post 5 carries a horieontally arranged dish ti held in position thereon hy a pin 9 and provided vvith a series oi openings l0, l0 and i0 tor a purpose to he eztplained.

"the post 5 is provided, near its upper end, with a peripheral groove ll, and the portion oil the post ahove the dish it is arranged to enter an opening it); in an irregularly shaped hloclr or trameniemher l3 vvhich carries the sharpening dislrs it and t5; "the. dislrs it and iii are secured to opposite ends oil a spindle lti vvhich is journaled in a sleeve lit held in lined relation against movement; in the direction oi the airis oi the spindle ltl hy collars lli. llhe spindle l6 is, hovvever, tree to rotate in the sleeve ll. 'Llhc sleeve ll is mounted in an opening it) in the lranae hloclr l3 and is tree to slide longitudinally relative to the hloclt. lit is normally pressed to the le'lt, as vievved in lhig. l, hy a coil springfiitl vvhich hears against a lug ill threaded into the sleeve ll" "lthe spring lid is housed Within an opening 5:212 in the hloclr 13. It. second spring $23 is located in a similar housing fit and hears against a second lug threaded into the sleeve lit. "llhe in not end oil the spring @3 hears against a log 26 secured to a lever Ql which is pivoted at as to the t'rame hloclr l3, as shown host in Fig. 2. lllhen the lever ill is in'the posiit soeltet d tltt tat

ll tlt tion shown in Fig. 2, the spring 2Q will hold the sleeve 17, the spindle 16 and the grinders '14 and 15 in the position shown in Fig. 4,

which is the inoperative position. If the lever 27 is shifted to the right, as viewed in Fig. 2, the pressure on the spring 23, which is a stiffer spring than spring 20, will overcome the resistance of spring 20 and the grinders will be forced to the right, as viewed in this figure, or into their operative positions.

The grinders are selectively brought into position, on the side adjacent the knife 2, by the rotation of the block 13 about the post 5 and the block is held in its difierent adjusted positions by a pin 29 which extends downwardly from the lower surface of the block 13 and is located in the plane of the axis of the spindle 16. In order to shift the block 13 about the post 5, it is necessary to raise the block upwardly to withdraw the pin 29 from the opening 10, 10 or 10" previous to the rotation of the block about the post. The amount of upward movement is limited by a downwardly extending bar 30 having its lower end offset at 31 to contact with the under surface of the disk 8 when the block 13 is raised upwardly. The opening 10 in the disk 8 is located in a plane passing through the center of the post 5 and perpendicular to the plane of the knife 2. The opening 10 is located in a plane at right angles to the plane of the opening 10, and the opening 10" is located in the side of the disk 8 opposite the opening 10 but slightly oifset from the plane of that opening. When the pin 29 is positioned in the opening 10" the grinder 14: will be positioned adjacent the knife but will have its axis inclined to the plane of the knife, as shown in Fig. 1, to cause the beveled portion of the grinder to bear properly against the bevel of the knife. When the post 29 engages the opening 10, the grinder 15 will be positioned adjacent the knife and will have its inner fiat surface parallel with the plane of the knife, as shown in broken lines in Fig. 1. When the post 29 engages the opening 10', both grinders will be shifted away from the knife into inoperative position. When the grinder frame is in the po sition shown in Figs. 1 and 6, the grinder 14 will be spaced slightly away from the knife2 when the lever 27 is in inoperative position, and the grinder may be forced into contact with the beveled edge of the knife by moving the lever 27 to the right or in a direction to compress the spring 23. This will cause the grinder to bear against the bevel portion of the blade under tension of this spring. When the grinder frame is rotated to bring the grinder 15 into operative position and the lever 27 is in inoperative position, the grinder 15 will be spaced slightly away from the blade 2 and on the with the flat surface of the knife to remove the bur from the edge of the blade. The lever 27 is held in operative position. against the tensionof the spring 23, by means of a detent 35 pivoted to the grinder frame at 36 and having a finger piece 37 by means of which it is pressed downwardly. A coil spring 38 normally forces the detent upwardly, a slot 39 being provided to permit a slight oscillation of the detent about its pivot 36. Notches 40 are provided in the upper surface of the detent for engaging a slot 41, in the upper end of the lever 27. to hold thelever in its operative position against the pressure of the spring 23.

The frame 13 is raised and lowered to permit rotation about the post 5 by a finger piece 42. secured to the upper end of a tube 43 threaded into the'upper portion of the block 13. The tube 43 may be utilized for oiling the sleeve 17 together with the post 5, and a spring pressed plug 44: is provided for closing the upper end of the opening in the tube. It will be apparent that the grinder frame cannot be rotated about the post 5 until it is lifted into its uppermost position, but it is also desirable to prevent lifting of the frame when either of the grinders is in contact with the blade, for it this should be done, as the grinder leaves the blade, it would be forced over the edge by the tension of the spring 23 and thus spoil the sharpness of the knife. It is also desirable to prevent downward movement of-the grinders onto the knife when they are moved by the lever 27 into their operative position relative to the frame 13, forif this should be done, the grinders would be moved downwardly into contact with the edge of the knife since the pressure of the spring 23 is sufiicient. to force the grinders into the plane of the cutting edge of the knife when the pressure is not opposed by contact between the grinder and the lateral face of the knife. To avoid any possible marring of the knife edge by improper operation of the grinder an interlocking arrangement is provided between the lever 27 and the post 5. The lever 27 is rigidly secured to its pivotal support 28 extending through a transverse opening in the block 13 which is arranged to lie in the same horizontal plane as the groove 11 in. the post 5 when the block 13 is in its lowered position. The pin 28 is provided with a notch 45 which has the same radius of curvature as the periphery of the post 5 and is arranged to lie in alinemerit with the outer surface of the post 5. as shown in Fig. 5, when the lever 27 is in its inoperative position. The portion of the si -r.

5. In combination, agrinder for a slicing macliineknife, a support for said grinder movable into and out of operative position, means for moving said grinder into and out of operative-position relative to said support, and means for preventing movement of said support when said grinder is in operative position relative thereto.

6. In combination, a grinder for a slicing machine knife, a support for said grinder movable into and out of operative position, means for shifting said grinder relative to said support, and neans for preventing the movement of said support when said grinder is in a given position.

7 In combination, a grinder for a slicing machine knife, a support for said grinder movable into and out of operative position relative to said knife, means for shifting said grinder into and out of operative position relative to said support, and means for preventing movement of said grinder into operative position relative to said support when said support is in a given position.

8. .Ineombination, a grinder for a slicing machine knife, a support for said grinder movable toward and away from said knife, means for shifting said grinder relative to said support, and means for preventing movement of said support toward said knife when said grinder is in such position relative thereto as to strike the edge of said knife if said support were moved toward said knife.

9. In combination, a grinder for a slicing machine knife, a support for said grinder movable into and out of operative position relative to said knife, means for moving said grinder relative to said support to bring said grinder into and out-of operative relation with said knife when said support is in operative position, and means for preventing movement of said support away from operative position when said grinder is in operativeposition relative to said knife.

10. In combination, a grinder, a support for said grinder, means for shifting the position of said grinder relative to said support, and a locking device for preventing shiftin of said grinder.

11. n combination, a slicin machine frame, a grinder support inova 1e relative to said frame, a grinder carried by said support and movable relative thereto, and a locking device for preventing movement of said grinder relative to said support when said support is in a given position relative to said frame.

12. In combination, a slicing machine frame, a grinder support mounted on said frame and movable relative thereto, a grinder carried by said support, means for shifting said grinder relative to said support, and a. locking device for preventing movement of, said support relative to said newness frame when said grinder is in oneposition relative to said support.

13. In combination, a grinder for a slicin machine knife, means for moving sai grinder into and out of contact with said knife by a plurality of movements, and means for controlling the sequence of said movements.

14. In combination, a grinder for a slicin machine knife, a support for said grinder movably carried by the frame of a slicing machine, and an interlocking device for controlling the movement of said grinder relative to said support and the movement of said support relative to said slicing machine frame.

15. In combination, a slicing machine frame, a grinder support movably mounted on-said frame, a grinder movably carried by said support, and an interlocking device controlled by the position of said support relative to said frame for controlling the movement of said grinder relative to said support;

16. In combinat qll, a slicing machine frame, a grinder support movable relative to said frame, a grinder mounted on said support and movable relative thereto, and an interlocking device controlled by the position of said inder relative to said support for control ing the movement of said support relative to said frame.

1 In combination, a slicing machine frame, a grinder support movably mounted on said frame, a grinder movably carried by said support, and an interlocking device for controlling the movement of said grinder relative, to said support and the movement of said support relative to said frame so that the two movements are made to depend one upon the other.

18. In combination, a slicing machine frame, for supporting a slicing knife, a grinder for the knife supported by said frame, a support for said grinder mounted on said frame and movable relative thereto to bring said grinder into and out of a position opposite said knife, means for moving said grinder relative to said support for bringing said grinder into and out of contact with said knife, and an interlocking device arranged to prevent movement of said support to shift said grinder away from said knife when said grinder is in contact with said knife and also arranged to prevent movement of said support to shift said grinder into contact with said knife.

19. A sharpener for slicing machines comprising a grinding device, resilient means for holding said grinding device out of operative position, and resilient means for forcing said grinding device into operative position.

20. lhe combination with a grindin device for sharpening the blade of a slicing machine, of resilient means for holding said If h) nae-race grinding device out of contact with said blade, and a second resilient means for forcing said grinding device into contact With said blade against the tension of said first.

mentioned resilient means.

2f. 'fhe combination with a grinder for a slicing machine blade, of a spindle on which said grinder is mounted, resilient means for moving said spindle longitudinally in one direction, and asecond resilient means for moving said spindle longitudinally in the opposite direction 22, in a sharpening device for slicing machines, a spindle having a grinder carried thereby, a spring for moving said spindle longitudinally in one direction, a second spring arranged to oppose the action of the first mentioned spring, and means for eaerting pressure on said second spring to cause said second spring to overcome the tension of said first spring to shift said spindle and move said grinder.

23. 'fhe combination with the frame of a slicing machine, of a sharpener support mounted for vertical movement thereon, a grinder carried by said sharpener support and movable relative'thereto into and out of operative position, a lever for shifting said rinder, and means connected With said lever for loclring said sharplener support a ainst vertical movement vv en said grin or is moved into operative position.

2d. The combination of a grinder for a slicing machine lrnife, a support for said grinder movable relative to said lrnife, mechanism for shifting said grinder relative to said support into and out of contact vvith said knife, and a locking device for preventing movement of said support to move said grinder into or out of contact with said knife.

' 25. The combination of a grinder support for a slicing machine, a post on Which said support is mounted, a grinder carried by sai support, a lever for moving said grinder relative to said support into and out of con tact with the knife of said slicing machine, and an interlocking connection betvveen said post and lever, to control the sequence of movement of said support relative to said post and said grinder relative to said suport. a

26. The combination with a supporting post having a peripheral groove therein, a grinder support carried on said post and movable relative thereto, a grinder movably carried by said support, a lever for operating said grinder, having a rotary pin connected therewith and arranged to lie adjacent said supporting post and having an opening therein for permitting movement of said support relative to said post When said lever is in a iven position and arranged to cooperate with said post to prevent such movement When said lever is in a diderent position.

In. testimony whereof l[ have signed my name to this specification on this nineteenth day of November, A. D. 1917..

Wl lLHlELll flUS A. van BERKEL tiff.

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